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Test riemann::trace_iter

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This commit is contained in:
numzero 2024-09-14 14:21:24 +03:00
parent 8ab9ab71e8
commit d90f473bd6
1 changed files with 15 additions and 2 deletions
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17
src/bin/flat/riemann.rs
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@ -169,11 +169,12 @@ pub mod samples {
#[cfg(test)]
mod tests {
use approx::assert_abs_diff_eq;
use super::*;
use glam::{Mat2, mat2, vec2};
use rand::{Rng, SeedableRng};
use super::{Decomp2, Metric, samples};
#[test]
fn uniform_scaled_metric() {
let mut rng = rand_pcg::Pcg64Mcg::seed_from_u64(17);
@ -192,4 +193,16 @@ mod tests {
assert_eq!(metric.globalize(rng.gen(), vec2(0., 1.)), vec2(0., 1. / 4.));
assert_eq!(metric.globalize(rng.gen(), vec2(1., 1.)), vec2(1. / 3., 1. / 4.));
}
#[test]
fn test_trace_iter() {
let metric = samples::ScaledMetric { scale: vec2(2., 4.) };
assert_eq!(trace_iter(&metric, vec2(3., 5.), vec2(1., 0.), 1.).nth(7).unwrap(), vec2(7., 5.));
assert_eq!(trace_iter(&metric, vec2(3., 5.), vec2(2., 0.), 1.).nth(7).unwrap(), vec2(7., 5.));
assert_eq!(trace_iter(&metric, vec2(3., 5.), vec2(1., 0.), 0.5).nth(7).unwrap(), vec2(5., 5.));
assert_eq!(trace_iter(&metric, vec2(3., 5.), vec2(0., 1.), 1.).nth(9).unwrap(), vec2(3., 7.5));
assert_eq!(trace_iter(&metric, vec2(3., 5.), vec2(0., 4.), 1.).nth(9).unwrap(), vec2(3., 7.5));
assert_eq!(trace_iter(&metric, vec2(3., 5.), vec2(0., 1.), 0.5).nth(9).unwrap(), vec2(3., 6.25));
assert_abs_diff_eq!(trace_iter(&metric, vec2(3., 5.), vec2(0.5, 0.25), std::f32::consts::SQRT_2).nth(7).unwrap(), vec2(7., 7.), epsilon=1e-5);
}
}